Breeding method of photo-thermo-sensitive genic male sterile line of quality rice

Abstract

The invention discloses a breeding method of a photo-thermo-sensitive genic male sterile line of quality rice and belongs to the field of plant breeding technology. The method comprises steps as follows: (1) selecting the photo-thermo-sensitive genic male sterile line Guangzhan 63S as a female parent, taking intermediate material Yandao 229 of routine medium indica rice which has a tight plant type, good lodging resistance, high quality and high resistance to rice blast as a male parent, and carrying out hybridization and combining and generation-adding to harvest F1 seeds; (2) planting F1 seeds and carrying out F2 large group selection, selecting superior individuals with good photo-thermo-sensitive genic male sterile characteristic, high quality and tight plant type at each generation starting from F2. Until self-crossing for six generation namely F6 generation, the photo-thermo-sensitive genic male sterile line with tight plant type, high quality, high resistance to rice blast and early-maturing medium indica type is bred and named as Yan 166S. A new combination of two-line indica hybrid rice prepared by the above bred photo-thermo-sensitive genic male sterile line can better solve the disadvantage of poor lodging resistance of the new combination of the two-line hybrid rice prepared by the indica-type photo-thermo-sensitive genic male sterile line Guangzhan 63S.

Description

technical field [0001] The invention relates to a plant breeding method, which belongs to the technical field of plant breeding, and more specifically relates to a method for breeding high-quality rice photothermosensitive genetic male sterile lines. Background technique [0002] Rice is the main food crop in my country, and the planting area of ​​hybrid rice accounts for more than half of the rice planting area in my country. In the past ten years, my country's hybrid rice breeding research has achieved world-renowned achievements, and successively bred new super two-line hybrid rice combinations such as "Liangyou Peijiu", "Liangyou 0293", and "Y Liangyou 2", and realized my country's super The goal of the first, second and third phases of high-yield rice yield per mu indicates that my country's rice breeding and production will continue to maintain the world's leading level. However, it must also be recognized that the first, second, and third phases of my country's super ...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems and deficiencies in the above-mentioned prior art. After years of experimental research, the applicant found in many hybrid breeding programs and breeding methods that the breeding of a high-quality rice photothermosensitive genetic male sterile line Method, the photothermosensitive genic male sterile line of rice with compact plant type, strong stem and high quality was successfully bred, and the new combination of two-line hybrid rice prepared by the above bred photothermosensitive genic male sterile line can better solve the problem of indica type Disadvantages of Poor Lodging Resistance of New Two-line Hybrid Rice Combination Prepared by Photothermosensitive Genic Male Sterile Line Guangzhan 63S

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